Multilingualism in Spain deals with the sociolinguistic and psycholinguistic aspects of established and new migrant minority groups in Spain. Three guiding analytical research approaches cut across minorities in Spain: language, migration and discrimination, although not all aspects apply to all minorities in the same way: some are characterised by language, migration and discrimination; other communities are only defined by language and migration, but their members are not discriminated against socially and culturally; another group of communities are not characterised by recent migration, but they are discriminated against and/or their languages not even officially recognised; lastly, there are some other communities that do not find enough legal and institutional support and their languages may suffer discrimination.